getValueForNullKey(),
        getMap()
            .computeIfAbsent(
                getKeyForNullValue(),
                k -> {
                  assertEquals(getKeyForNullValue(), k);
                  return getValueForNullKey();
                }));
    expectReplacement(entry(getKeyForNullValue(), getValueForNullKey()));
  }

        getValueForNullKey(),
        getMap()
            .computeIfAbsent(
                getKeyForNullValue(),
                k -> {
                  assertEquals(getKeyForNullValue(), k);
                  return getValueForNullKey();
                }));
    expectReplacement(entry(getKeyForNullValue(), getValueForNullKey()));
  }

  public void testRemoveAllNullKeyPresent() {
    initMultimapWithNullKey();

    assertContentsAnyOrder(multimap().removeAll(null), getValueForNullKey());

    expectMissing(mapEntry((K) null, getValueForNullKey()));
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_ANY_NULL_QUERIES})
  public void testRemoveAllNullKeyAbsent() {
    assertEmpty(multimap().removeAll(null));

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testCompute_presentNullToPresentNonnull() {
    initMapWithNullValue();
    V value = getValueForNullKey();
    assertEquals(
        "Map.compute(presentMappedToNull, functionReturningValue) should return new value",
        value,
        getMap()
            .compute(
                getKeyForNullValue(),

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_KEYS})
  public void testRemoveNullKeyPresent() {
    initMultimapWithNullKey();

    assertTrue(multimap().remove(null, getValueForNullKey()));

    expectMissing(mapEntry((K) null, getValueForNullKey()));
    assertGet(getKeyForNullValue(), ImmutableList.<V>of());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUES})

    assertEquals(
        "remove(null) should return the associated value",
        getValueForNullKey(),
        getMap().remove(null));
    assertEquals(
        "remove(present) should decrease a map's size by one.", initialSize - 1, getMap().size());
    expectMissing(entry(null, getValueForNullKey()));
  }

  @MapFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)

  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testGet_nullContained() {
    initMapWithNullKey();
    assertEquals("get(null) should return the associated value", getValueForNullKey(), get(null));
  }

  public void testGet_wrongType() {
    try {
      assertNull("get(wrongType) should return null or throw", getMap().get(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }

    int nullKeyLocation = getNullLocation();
    Entry<K, V> oldEntry = array[nullKeyLocation];
    array[nullKeyLocation] = entry(null, oldEntry.getValue());
    return array;
  }

  protected V getValueForNullKey() {
    return getEntryNullReplaces().getValue();
  }

  protected K getKeyForNullValue() {
    return getEntryNullReplaces().getKey();
  }

  private Entry<K, V> getEntryNullReplaces() {

  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_presentNull() {
    initMapWithNullKey();
    assertEquals(
        "getOrDefault(null, default) should return the associated value",
        getValueForNullKey(),
        getMap().getOrDefault(null, v3()));
  }

  @MapFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_presentMappedToNull() {

        v3(),
        getMap()
            .computeIfPresent(
                null,
                (k, v) -> {
                  assertNull(k);
                  assertEquals(getValueForNullKey(), v);
                  return v3();
                }));

    Entry<K, V>[] expected = createArrayWithNullKey();
    expected[getNullLocation()] = entry(null, v3());
    expectContents(expected);
  }